Add day 2 '22 solution

src/Y22/Day2/RPS.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace trizz\AdventOfCode\Y22\Day2;
+
+enum RPS
+{
+    case ROCK;
+
+    case PAPER;
+
+    case SCISSORS;
+
+    public function score(): int
+    {
+        return match ($this) {
+            self::ROCK => 1,
+            self::PAPER => 2,
+            self::SCISSORS => 3,
+        };
+    }
+
+    public function winningOpposite(): RPS
+    {
+        return match ($this) {
+            self::ROCK => self::PAPER,
+            self::PAPER => self::SCISSORS,
+            self::SCISSORS => self::ROCK,
+        };
+    }
+
+    public function losingOpposite(): RPS
+    {
+        return match ($this) {
+            self::ROCK => self::SCISSORS,
+            self::PAPER => self::ROCK,
+            self::SCISSORS => self::PAPER,
+        };
+    }
+
+    public static function fromPuzzleInput(string $value): RPS
+    {
+        return match ($value) {
+            'A', 'X' => self::ROCK,
+            'B', 'Y' => self::PAPER,
+            'C', 'Z' => self::SCISSORS,
+            default => throw new \LogicException('Invalid value.'),
+        };
+    }
+}